Pesawat penerima radio, televisi, tape recorder, video, ìmesin bicara, gramaphone, pickup, rewinder, amplifier, loud ìspeaker, microphone, megaphone, headphone, wireless, VCD, ìoptik, kaca mata, lensa-lensa, mikroskop, teropong, teleskop, ìpesawat komunikasi, telephone, airphone, walky talky, handy ìtalky, pesawat telex, pita-pita magnetik, pita cassette, pita ìvideo disk recorder, laser disk, piringan hitam, compact disk ì(audio, video), antena,booster, radar,parabola, accu, baterai,batu baterai, bel listrik, kabel telepon,transformator, travo,ballast, stepup, stepdown, mesin faksimili, komputer, mesinhitung,kalkulator, kas register,mesin teleks, printer,pesawat-pesawat ukur, speedometer, ampere meter,meteran listrik, voltameter, modem-modem, monitor (program komputer), cpu, stopkontak, sakelar,switch-switch,fiting-fiting, kombinasi fiting,stecker, sonar, vacuum cleaner (alat pembersih debu), seterikalistrik, mesin fotocopy, disket, pesawat-pesawat pemadam api,alat solder listrik